US7791442B2 - Electronic transformer used in low-voltage lamps - Google Patents
Electronic transformer used in low-voltage lamps Download PDFInfo
- Publication number
- US7791442B2 US7791442B2 US11/943,598 US94359807A US7791442B2 US 7791442 B2 US7791442 B2 US 7791442B2 US 94359807 A US94359807 A US 94359807A US 7791442 B2 US7791442 B2 US 7791442B2
- Authority
- US
- United States
- Prior art keywords
- cover plate
- lower cover
- grooves
- insulating jacket
- plastic insulating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related, expires
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Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B39/00—Circuit arrangements or apparatus for operating incandescent light sources
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/02—Casings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F30/00—Fixed transformers not covered by group H01F19/00
- H01F30/06—Fixed transformers not covered by group H01F19/00 characterised by the structure
- H01F30/16—Toroidal transformers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/06—Mounting, supporting or suspending transformers, reactors or choke coils not being of the signal type
Definitions
- the invention relates to an electronic transformer, in particular an electronic transformer used in low-voltage lamps.
- Low-voltage lamps distributed in the market presently such as quartz halogen-tungsten lamps, have the properties of projecting in close quarters and being used safely etc., for theirs high color rendering index, they have been used extensively in commerce and domesticity. But it's necessary to use a voltage reducing transformer to supply power for the normal operation of the lamps, and to switch town electricity into an isolated and safe low voltage electricity.
- the voltage switch isolating transformer in this kind of electronic transformers, primary and secondary windings are normally winded on a magnetic core, and after insulation they are installed in the outer case of the electronic transformers. The outer case will isolate the voltage switch isolating transformer from environment completely.
- the key problem is to reduce the height of the voltage switch isolating transformer. It is also a problem hardly to be broken through. For it is a magnetoelectricity apparatus of power, only reduces the thickness of materials, the safety and the reliability of the apparatus will not meet the requirement, and only reduces the thickness of the magnetic core, the magnetic property and the mechanical intensity of the magnetic core will deteriorate quickly, even to the extent that the apparatus can not be operated normally.
- the electronic transformer installed coordinately can be a super-thin one.
- the space occupied by the transformer can not be too large and too high and the heat dispersion should be good enough so as to it can be used conveniently. Furthermore, to meet the particular requirements of the different installation space and structure, it is desired to be a lighter, thinner and more beautiful one.
- the object of the invention is to provide a lighter, thinner and more beautiful electronic transformer which is easy to be operated and has a good heat dispersion property and up to the correlative international safety standard so as to solve the technical problems of the electronic transformer mentioned above.
- An electronic transformer used in low-voltage lamps mainly includes an outer case, an electronic controlling circuit and a voltage switch isolating transformer, in which the outer case consists of an upper cover plate 1 and a lower cover plate 2 ; the electronic controlling circuit and the magnetic core coil 6 of the voltage switch isolating transformer are put between the upper cover plate 1 and the lower cover plate 2 ; the outside of the lower cover plate 2 provides concaving grooves 9 adapting to coil winding, the corresponding line passage holes 10 and a center hole 12 of the cover plate; the windings of the voltage switch isolating transformer are embedded in the grooves 9 through the center hole 12 of the cover plate, the line passage holes 10 and the center hole of the magnetic core coil 6 ; the upper cover 1 plate and the lower cover plate 2 are embedded with each other.
- the outside of the upper cover plate 1 provides concaving grooves 15 adapting to coil winding, the corresponding line passage holes 16 and a center hole 17 of the cover plate; the upper cover plate 1 and the lower cover plate 2 are embedded with each other; the windings of the voltage switch isolating transformer are embedded in the grooves 9 and the grooves 15 through the center hole 12 of the lower cover plate 2 , the line passage holes 10 , the center hole 17 of the upper cover plate 1 , the line passage holes 16 of the upper cover plate and the center hole of the magnetic core coil 6 .
- the inside of the upper cover plate 1 or of the lower cover plate 2 provides a cavity 4 and a flange 5 , and the magnetic core coil 6 is put between the cavity 4 and the flange 5 .
- a plastic insulating jacket 3 for the magnetic core coil 6 may also be put between the upper cover plate 1 and the lower cover plate 2 ; the plastic insulating jacket 3 provides a center hole 13 , and the grooves 7 adapting to coil winding are put on the top of the jacket; the magnetic core coil 6 is put between the plastic insulating jacket 3 and lower cover plate 2 ; the windings of the voltage switch isolating transformer are embedded in the grooves 7 and the grooves 9 through the center hole 13 of the plastic insulating jacket 3 , the center hole of the magnetic coil 6 , the center hole 12 of the lower cover plate and the line passage holes 10 .
- the grooves 7 put on the top of the plastic insulating jacket 3 form protruding grooves in shape of a rabbet, the height of which is higher than the top plane 11 of the jacket 3 , and the height of whose protruding part equals to the thickness of the upper cover plate's wall; the upper cover plate 1 has a hole 8 on it, and the grooves 7 are embedded properly in the hole 8 .
- the plastic insulating jacket 3 has a shape of an inverse flat pan, and the magnetic core coil 6 is put in the plastic insulating jacket 3 .
- Line passage holes 14 are put in the grooves 7 , and near to the outer end of the plastic insulating jacket's top. The windings can go into the line passage holes 10 of the lower cover plate through the grooves 7 and the line passage holes 14 .
- the inside of the lower cover plate 2 provides the cavity 4 and the flange 5 , and the magnetic core coil 6 is put in the space formed between the plastic insulating jacket 3 , the cavity 4 and the flange 5 .
- the surface of the windings can be disposed with a high strength insulating material to assure the safety of the windings and the entire transformer.
- a protecting film can be adhered additionally to the windings on the outside of the cover plate.
- the upper cover plate or the lower cover plate of the invention has suitable grooves adapting to the windings, and the cover plates themselves can be used as a framework for the windings, that is the windings of the transformer can be winded directly on the cover plates of the outer case, so it is not necessary to apply an additional protecting packing case on the outside of the windings of the transformer.
- the thickness of the electronic transformer can be reduced by at least the thickness of one cover plate's wall which is about 2 mm; if suitable windings are set on the upper cover plate and the lower cover plate at the same time, the thickness of the electronic transformer can be reduced by at least the thickness of two cover plate's walls which is about 4 ⁇ 5 mm.
- the coil winded on the plastic insulating jacket can be embedded properly into the hole so that the upper cover plate can be retracted in the direction of the lower cover plate by at least the thickness of one cover plate's wall which is about 2 mm.
- the electric windings can be winded in the grooves properly, that is, the wall of the lower cover plate can be used directly as the framework for the windings, so that the thickness of the transformer can be reduced by at least the thickness of one cover plate's wall which is about 2 mm.
- the thickness of the electronic transformer can be reduced totally by 4 ⁇ 5 mm.
- the creepage distance between the high voltage windings and the low voltage windings can be increased, and the electricity isolation between the two windings become safer.
- the appearance of the electronic transformer becomes more beautiful and the heat of the transformer is easier to be dispersed.
- the transformer is portable, beautiful and the space occupied is smaller, and it is more convenient to be installed with other decorating structures.
- the technique in accordance with the invention is suitable for not only the electronic transformers for the low-voltage lamps, but also for various power supplying adapters, the converters and the transformers which have safe low voltage outputs and need to be thin.
- the drawing 1 is a perspective view of the embodiment 1 in accordance with the invention.
- the drawing 2 is a perspective view of the embodiment 2 in accordance with the invention.
- the drawing 3 is a picture for the assembling procedure of the secondary windings of the embodiment 2 in accordance with the invention.
- the drawing 4 is a picture for the assembling procedure of the upper cover plate and the lower cover plate of the embodiment 2 in accordance with the invention.
- the drawing 5 is a front view for the product in accordance with the invention.
- the drawing 6 is a top view for the product in accordance with the invention.
- upper cover plate 1 there are upper cover plate 1 , lower cover plate 2 , plastic insulating jacket 3 , cavity 4 , flange 5 in the cavity, magnetic core coil 6 , grooves 7 , hole 8 of the upper cover plate, concaving grooves 9 of the lower cover plate, line passage holes 10 , top plane 11 of the plastic insulating jacket, center hole 12 of the lower cover, center hole 13 of the plastic insulating jacket, line passage holes 14 of the plastic insulating jacket, concaving grooves 15 of the upper cover plate, line passage holes 16 of the upper cover plate, center hole 17 of the upper cover plate.
- the present invention is composed mainly of the outer case, the electronic controlling circuit and voltage switch isolating transformer, in which the outer case consists of the upper cover plate and the lower cover plate.
- the primary windings are winded firstly on the magnetic core, and form the magnetic core coil 6 of the voltage switch isolating transformer after insulation.
- the magnetic core coil 6 is put between the upper cover plate and the lower cover plate; the magnetic core coil 6 is a circle, of course it can also be a ellipse, a square or other geometrical shapes.
- the magnetic core coil 6 is a circle, ellipse, square or other various geometrical shape, the shape of the cavity 4 and of the flange 5 in the cavity will be changed correspondingly.
- the outside of the lower cover plate 2 provides the concave grooves 9 adapting to the windings, the corresponding line passage holes 10 and a center hole 12 of the cover plate.
- the outside of the upper cover plate 1 provides the concave grooves 15 adapting to the windings, the corresponding line passage holes 16 and the center hole 17 of the cover plate; the upper cover plate 1 and the lower cover plate are embedded with each other; the secondary windings of the voltage switch isolating transformer are embedded in the grooves 9 and the grooves 15 through the center hole 12 of the lower cover plate 2 , the line passage holes 10 , the center hole of the magnetic core coil 6 , the center hole 17 of the upper cover plate and the line passage holes 16 .
- the upper and lower cover plates themselves can be used as the framework for the windings, that is the windings of the transformer are winded directly on the cover plates of the outer case.
- the windings of the voltage switch isolating transformer can merely be put on one of the upper and lower cover plates, for example, on the lower cover plate 2 , the reduction of the thickness of the electronic transformer is reduced by about 2 mm, but it is convenient to repair.
- the inside of the upper cover plate 1 or the lower cover plate 2 links fixedly the circle cavity 4 and the flange 5 which can be installed correspondingly with the internal hole of the magnetic core coil 6 ; the center of the flange 5 is the center hole 12 of the lower cover plate.
- the magnetic core coil 6 is put between the cavity 4 and the flange 5 .
- the cavity 4 and the flange 5 may be omitted.
- the cavity 4 and the flange 5 may be set on the inside of both cover plates or of any one of the cover plate; and the cavity 4 and the flange 5 may be connected integratedly with the cover plate or the cover plate, or connected with them or it separately.
- the cavity 4 and the flange 5 may be used selectively, that is they are not to be needed at the same time; but it is preferable that the cavity 4 and the flange 5 are connected integratedly with the cover plates, and the cavity 4 and the flange 5 are set on the upper cover plate and the lower cover plate at the same time. It is preferable that the inside and the outside of the upper and the lower cavities, and the upper and the lower flanges can be embedded with each other suitably, so as to increase the creepage distance between the high and low voltage windings of the transformer to increase the safety.
- the upper cover plate 1 has a fan-shaped hole 8
- a plastic insulating jacket 3 for protecting the magnetic core coil is set between the upper cover plate and the lower cover plate.
- a structure of setting secondary windings on the plastic insulating jacket 3 replaces the structure of directly setting secondary windings on the upper cover.
- the center of the flange 5 is the center hole 12 of the lower cover.
- the cavity 4 and the flange 5 may be omitted.
- the plastic insulating jacket 3 has a shape of an inverse flat pan, there is a center hole 13 on it's center area, and the jacket 3 and the cavity 4 are embedded with each other.
- the magnetic core coil 6 is put in the space formed between the plastic insulating jacket 3 , the cavity 4 and flange 5 of the lower cover plate 2 .
- the plastic insulating jacket 3 provides the grooves 7 adapting to the windings and the line passage holes 14 .
- the plastic insulating jacket 3 may be also a plane in shape.
- the plastic insulating jacket 3 can be used alone without a structure of the cavity 4 to be embedded with. All these are equivalent structures in applications.
- the grooves 7 put on the top of the plastic insulating jacket 3 form protruding grooves in shape of a rabbet, the height of which is higher than the top plane 11 of the jacket 3 , and the height of whose protruding part equals to the thickness of the upper cover plate's wall.
- the upper cover plate 1 has a hole 8 on it, so that the grooves 7 are embedded properly in the hole 8 to assure that the peak of the grooves 7 is placed on the same level as the outside of the upper cover plate 1 .
- the grooves 7 may also be concaving grooves that is on the same level as the top plane 11 .
- the size and the form of the hole 8 must match the form of the top of the plastic insulating jacket 3 so that the top of the plastic insulating jacket 3 can be embedded entirely into the hole 8 .
- the top of the plastic insulating jacket 3 can be embedded suitably into the upper cover plate and be used directly as a part of the covering surface of the upper cover plate, that is the upper cover plate is retracted by the thickness of one cover plate's wall on the direction of lower cover plate.
- the cavity 4 and the flange 5 may be connected fixedly or separately with the lower cover plate 2 , all these are equivalent structures in applications. But it is preferable that they are connected fixedly, and the cavity 4 and the plastic insulating jacket 3 are embedded with each other. Therefore the creepage distance between high and low voltage windings of the transformer can be increased, and the safety and the reliability are increased.
- the position on the outside of the lower cover plate which is opposite to the cavity 4 provides suitable concaving grooves 9 for the windings, corresponding line passage holes 10 and the center hole 12 of the lower cover plate.
- the secondary windings of the voltage switch isolating transformer are embedded into the grooves 7 and the grooves 9 through the center hole 13 of plastic insulating jacket 3 , the center hole of the magnetic core coil 6 , the center hole 12 of the lower cover plate, the line passage holes 10 and the line passage holes 14 .
- the lower cover plate 2 and plastic insulating jacket 3 may be used as the framework for the secondary windings, and the primary and secondary windings may be isolated by it also.
- the line passage holes 14 are put in the grooves 7 , and near to the outer end of the plastic insulating jacket's top.
- the windings can go into the line passage holes 10 of the lower cover plate through the grooves 7 and the line passage holes 14 .
- the line passage holes 14 may be omitted.
- the secondary windings When the secondary windings are winded, they may go into the line passage holes 10 of the lower cover plate 2 around the outer wall of the plastic insulating jacket 3 . All these are equivalent structures in applications.
- the grooves 9 set on the lower cover plate 2 are concaving ones, the peak of the which is placed on the same level as the outside of the lower cover plate 2 .
- the inner depth of the grooves 7 and the grooves 9 should insure that the secondary windings will not higher than the peak of the grooves after winding.
- One circle or more circles of the secondary windings are placed in each groove of the grooves 7 and the grooves 9 .
- the number arranged for the grooves 7 and the grooves 9 can be figured out beforehand depending on the real needs, and the number may be selected correspondingly
- the low voltage secondary windings are put in the grooves, and the peak of the grooves is placed on the same level as the surface of the upper and lower cover plates. But due to the windings of the installed electronic transformer are exposed on the upper and lower cover plates, the surface of the windings can be disposed with a high strength insulating material to assure the safety of the low voltage windings and the entire transformer.
- the protruded part of the secondary windings from the upper and lower cover plates forms regular lines which looks very good and has an effective heat dispersion.
- a protecting film may be adhered to the windings on the outside of the cover plate.
- the protecting film may also be a label.
- the electronic controlling circuit may not be the necessary components.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Insulating Of Coils (AREA)
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN200510034822 | 2005-05-30 | ||
CNB2005100348222A CN100502612C (zh) | 2005-05-30 | 2005-05-30 | 一种低压灯用电子变压器 |
CN200510034822.2 | 2005-05-30 | ||
PCT/CN2005/002330 WO2006128340A1 (fr) | 2005-05-30 | 2005-12-28 | Transformateur electronique utilise dans des lampes a basse tension |
CNPCT/CN2005/002330 | 2005-12-28 | ||
WOPCT/CN2005/002330 | 2005-12-28 |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CN2005/002330 Continuation WO2006128340A1 (fr) | 2005-05-30 | 2005-12-28 | Transformateur electronique utilise dans des lampes a basse tension |
Publications (2)
Publication Number | Publication Date |
---|---|
US20080186119A1 US20080186119A1 (en) | 2008-08-07 |
US7791442B2 true US7791442B2 (en) | 2010-09-07 |
Family
ID=35476646
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/943,598 Expired - Fee Related US7791442B2 (en) | 2005-05-30 | 2007-11-21 | Electronic transformer used in low-voltage lamps |
Country Status (3)
Country | Link |
---|---|
US (1) | US7791442B2 (zh) |
CN (1) | CN100502612C (zh) |
WO (1) | WO2006128340A1 (zh) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011014200A1 (en) * | 2009-07-31 | 2011-02-03 | Radial Electronics, Inc | Embedded magnetic components and methods |
US8203418B2 (en) * | 2007-01-11 | 2012-06-19 | Planarmag, Inc. | Manufacture and use of planar embedded magnetics as discrete components and in integrated connectors |
US7821374B2 (en) | 2007-01-11 | 2010-10-26 | Keyeye Communications | Wideband planar transformer |
KR100978503B1 (ko) * | 2010-04-23 | 2010-08-31 | 주식회사 시스하이텍 | 슬림형 고전압 트랜스포머 |
GB2549770A (en) * | 2016-04-28 | 2017-11-01 | Murata Manufacturing Co | Power electronics device with improved isolation performance |
CN112038042A (zh) * | 2020-09-09 | 2020-12-04 | 沅陵县欣利昌电子有限公司 | 一种高稳定性的电感线圈及制备方法 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH118145A (ja) | 1997-05-17 | 1999-01-12 | Lg Electron Inc | フライバックトランスの一体型ボビン構造 |
CN2655401Y (zh) | 2003-09-29 | 2004-11-10 | 联昌电子企业股份有限公司 | 变压器结构 |
US7342476B2 (en) * | 2002-05-31 | 2008-03-11 | Sumida Corporation | Leakage transformer |
US20080157696A1 (en) * | 2006-12-27 | 2008-07-03 | Pokharna Rajendra K | Lamp igniter module and transformer carrier |
US7585177B2 (en) * | 2007-08-13 | 2009-09-08 | Koito Manufacturing Co., Ltd. | Discharge lamp socket |
-
2005
- 2005-05-30 CN CNB2005100348222A patent/CN100502612C/zh active Active
- 2005-12-28 WO PCT/CN2005/002330 patent/WO2006128340A1/zh active Application Filing
-
2007
- 2007-11-21 US US11/943,598 patent/US7791442B2/en not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH118145A (ja) | 1997-05-17 | 1999-01-12 | Lg Electron Inc | フライバックトランスの一体型ボビン構造 |
US7342476B2 (en) * | 2002-05-31 | 2008-03-11 | Sumida Corporation | Leakage transformer |
CN2655401Y (zh) | 2003-09-29 | 2004-11-10 | 联昌电子企业股份有限公司 | 变压器结构 |
US20080157696A1 (en) * | 2006-12-27 | 2008-07-03 | Pokharna Rajendra K | Lamp igniter module and transformer carrier |
US7585177B2 (en) * | 2007-08-13 | 2009-09-08 | Koito Manufacturing Co., Ltd. | Discharge lamp socket |
Also Published As
Publication number | Publication date |
---|---|
WO2006128340A1 (fr) | 2006-12-07 |
CN100502612C (zh) | 2009-06-17 |
CN1700836A (zh) | 2005-11-23 |
US20080186119A1 (en) | 2008-08-07 |
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AS | Assignment |
Owner name: EAGLERISE ELECTRIC & ELECTRONIC (FOSHAN) CO., LTD. Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:ZOU, GAODI;REEL/FRAME:020322/0239 Effective date: 20071220 |
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Free format text: PATENT EXPIRED FOR FAILURE TO PAY MAINTENANCE FEES (ORIGINAL EVENT CODE: EXP.); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
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STCH | Information on status: patent discontinuation |
Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |
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FP | Lapsed due to failure to pay maintenance fee |
Effective date: 20180907 |